... Standard:Q/OHAD006-2004,YB/T5052 Seamless Steel Pipe For Geological Drill Standard:Q/OHAD006-2004,YB/T5052Application:For Geological Drill InSize Q/OHAD006-2004 ... 0 , 6.5 505.5 , 6.5 6820 715.0Rope for core734.0 , 7.0 894.5 , 5.0 896. ... 0Rope for core1084.5 1214.5 , 5.0 1274.5 , 5. ... .Kaiteng Metal Material CO,. ltdMavisTel:0086 18366453428 Geological Drill Seamless Steel Pipe